Horizontal band saw machine

ABSTRACT

The basic technical concept of the invention resides in a horizontal type band saw machine adapted to utilize the method or maintaining the band saw blade at a travelling speed selected depending upon the property and shape of the material to be machined, of introducing operating fluid or an hydraulic mechanism controlling raising and lowering of a housing accommodating said band saw blade into a plunger pump at a speed in accordance with an effective weight of the housing, and of sending out the thus introduced operating fluid by driving the plunger pump periodically in a cycle corresponding to the travelling speed of the band saw blade. The machine of the invention comprises novel mechanisms such as a mechanism for imparting a predetermined tension to the band saw blade, a safety mechanism for detecting slippage of the band saw blade, a guide mechanism comprising a combination or specially arranged rollershaped guide member and plate-like guide member, a mechanism comprising a plurality or supporting means for supporting the back of the band saw blade, a mechanism for detecting conditions of the feeding material, a feed roller mechanism, and a mechanism for securely clamping sawn pieces.

United States Patent [1 1 Sato et al.

[ 1 HORIZONTAL BAND SAW MACHINE {75] Inventors: Masao Sato, Sagamihara; Tsuneo Aizawa, lsehara; Kenji Ohnishi, Sagamihara; Shigeo Koizumi, Hatano; Akio Fukuda, Yokohama; Shinki Kikuchi, Sagamihara; Shichiro Kusanagi, lsehara, all of Japan [73] Assignee: Amada Company Limited, lsehara,

Japan [22] Filed: June ll, 1973 [2|] Appl. No.: 368,994

Related U.S. Application Data [62] Division of Ser. No. 159,625, July 6, 1971, Pat. No.

[52] U.S. Cl. r. 83/58; 83/62.]; 83/522; 192/84 P; 192/150 [51] Int. Cl B23d 53/00; 823d 55/04 [58] Field of Search 83/58, 62, 62.1, 522; 192/84 P, 150

[56] References Cited UNITED STATES PATENTS 2,602,987 7/l952 Wells 83/62 [111 3,889,561 1 June 17, 1975 Primary Examiner-J. M. Meister {5 7] ABSTRACT The basic technical concept of the invention resides in a horizontal type band saw machine adapted to utilize the method or maintaining the band saw blade at a travelling speed selected depending upon the property and shape of the material to be machined, of introducing operating fluid or an hydraulic mechanism controlling raising and lowering of a housing accommodating said band saw blade into a plunger pump at a speed in accordance with an effective weight of the housing, and of sending out the thus introduced operating fluid by driving the plunger pump periodically in a cycle corresponding to the travelling speed of the band saw blade. The machine of the invention comprises novel mechanisms such as a mechanism for imparting a predetermined tension to the band saw blade, a safety mechanism for detecting slippage of the band saw blade, a guide mechanism comprising a combination or specially arranged roller-shaped guide member and plate-like guide member, a mechanism comprising a plurality or supporting means for supporting the back of the band saw blade, a mechanism for detecting conditions of the feeding material, a feed roller mechanism, and a mechanism for securely clamping sawn pieces.

1 Claim, 38 Drawing Figures PATENTEIJJUN 1 7 1975 SHEET SHEET PATENTEDJUN 1 7 I975 N L MES A Nw w Uf Q m :Hm 0 w SHEEY PATENTEDJUN 1 7 ms RN QR mm CNN 5 wPN mm 2N i N OmN 8N m m N n NhN @N am wmw mp 0E PATENTEDJUN 11 m 889,561 SHEET 8 300 FIG. 11. L I K PATENIEDJUN 17 I975 SHEET FIG.24

PATENTEDJUN 17 m5 SHEET FIG. 27

PATENTEDJUN 17 I975 SHEET W FIG. 30

SHEET PATENTEDJUN 1 7 I975 FIG 32 FIG. 33 

1. A horizontal band saw machine comprising at least one blade extending from one side of the outer surface of a cover mounted on a boss of a follower wheel which is rotatably mounted onto a shaft, an arm extending from one side of that portion of said shaft which extends upward through and out of said cover, a nocontact switch provided at said arm and spaced apart from said at least one blade, and a detector device connected to said switch. 